Ava White's alleged killer texted his mum saying he was "gonna end up going the cells for nothing".
Ava, 12, was stabbed in the neck during an altercation with a teenage boy in Liverpool city centre. Boy A, 14, from South Liverpool, who cannot be named for legal reasons, denies murder and manslaughter.
Prosecutors say he stabbed Ava after she pushed him during an argument over him filming a video of her, which he posted on Snapchat. They allege Boy A smirked, laughed and ran away, leaving her to die, then began a "cover up" by discarding his flick knife, designer coat and mobile phone.
